It’s a week of zany antics on Sony’s downloadable store for PlayStation 3 and PSP. The headline download is Namco Museum Essentials, a collection of 80s arcade classics. Joining that, however, is Sackboy dressed up in Ghostbusters outfits, a PSP re-release of mid-90s classic Myst, and the inexplicably long-titled Holy Invasion of Privacy Badman! What Did I Do to Deserve This?

Sony’s Grace Chen also reminds online consumers that a summer sale is ongoing, and prices have been slashed for some of the store’s most popular games. (PixelJunk Eden for $5, anyone?) Following is the highlights from this week’s collection of downloads, but for the full list, including system themes, music game downloads, videos, and extra DLC, check Sony’s official PlayStation Blog:

Downloadable Games (PS3)

Namco Museum Essentials ($9.99)Namco Museum Essentials brings the arcades to your living room with five classic games and a brand new arranged Xevious title. Challenge your friends’ high scores and unlock NM Stamps, PlayStation Home rewards and trophies as you re-live the sights and sounds of the 80’s.

PSone Classics (PS3 / PSP)

Spec Ops: Ranger Elite ($5.99)
Immerse yourself in one of the first realistic military tactical combat simulators to be released. Choose your two-man team from a squad of five highly trained specialists: machine gunner, grenadier, rifleman, close quarters specialist, and sniper. Choose to complete your mission through stealth or all-out assault as you’re in control of an elite team of U.S. Army Rangers.

Game Demos

Trash Panic DemoTrash Panic adds a whole new element to puzzle video games – waste management! This PS3 system downloadable exclusive will challenge players to be “eco-friendly” in disposing of garbage in a trash bin to prevent overflow. Everyone will enjoy competing against the clock and friends for the highest scores in this fast-paced puzzle game available on PSN.

FUEL Demo
This playable demo offers a taster of one race and one challenge from the full game, as well as the chance to try out Free Ride in a section of the wastelands. FUEL delivers exhilarating, spectacular races, at any time of day in a huge range of vehicles. Experience the dynamic weather system and witness how deadly tornadoes and sandstorms affect the way your race plays out. The landscape may be ravaged but the race is definitely on.

Namco Museum Essentials TrialNamco Museum Essentials Trial brings the arcades to your living room with four playable classic arcade games . Re-live the sights and sounds of the 80’s with demo versions of Pac-Man, Galaga, DIG DUG and XEVIOUS. Unlock PlayStation Home rewards to customize your Home Avatar.

Add-on Game Content

LittleBigPlanetGhostbusters Costume Pack ($5.99)
To celebrate Ghostbusters The Video Game, get costumes based on your favorite ghost hunting heros, the Ghostbusters! Get the the Ghostbusters’ uniform, Slimer, the Stay Puft Marshmallow Man, and even a costume based on the Ghostbusters’ “No Ghosts” logo. If you got ghosts running around your level, who ya gonna call?

NCAA Football 2010 Add-Ons (x17) ($1.25 – $12.50)
A variety of add-ons for NCAA Football 2010.

Downloadable Games (PSP)

Holy Invasion of Privacy Badman! What Did I Do to Deserve This? ($19.99)
Become the God of Destruction and protect the evil Overlord Badman from the heroes who seek to capture him and loot his underground kingdom in the name of justice. Put your dungeon-building skills to the test, and create a balanced ecosystem for your monsters to thrive.

MYST ($19.99)
Enter the Surreal World of MYST. There are no instructions, and you encounter no living beings but soon realize your actions may help individuals who are somehow trapped in a parallel dimension.

Unbound Saga ($14.99)Unbound Saga is a 3D side-scrolling brawler set in a satirical comic book universe, where enemies are drawn onto the screen and madcap battles travel from panel to panel through a twisted, post-apocalyptic landscape – break off a weapon and RAGE OFF THE PAGE!